You mean you want an ipod adapter for the ISF to control it via the nav screen?
Your options are to use the vaistech adapter, or the oem ipod adapter they can be found here:
vaistech:
www.vaistech.com
OEM:
http://cgi.ebay.com/ebaymotors/TOYO...wItemQQptZCar_Audio_Video?hash=item2a03aaffab
I personally bought the OEM one and installed it myself, it was kind of a pain but worth it versus having to pay the dealership.
Alternatively you can just use the aux headphone jack in the armrest but you will have to control your ipod manually.